<template>
    <Category :scene="scene"></Category>
    <el-card style="margin:10px 0">
        <div v-show="scene == 0">
            <el-button type="primary" size="default" icon="Plus" @click="addAttr"
                :disabled="categoryStore.c3Id ? false : true" v-has="`btn.Attr.add`">添加属性</el-button>
            <el-table border style="margin:10px 0" :data="attrArr">
                <el-table-column label="序号" type="index" align="center" width="80px"></el-table-column>
                <el-table-column label="属性名称" prop="attrName" width="120px"></el-table-column>
                <el-table-column label="属性值名称">
                    <template #="{ row, $index }">
                        <el-tag style="margin:3px" v-for="item in row.attrValueList" :key="item.id">
                            {{ item.valueName }}
                        </el-tag>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="200px">
                    <template #="{ row, $index }">
                        <el-button type="primary" size="small" icon="Edit" @click="updateAttr(row)"
                            v-has="`btn.Attr.update`">编辑</el-button>
                        <el-popconfirm :title="`你确定删除${row.attrName}?`" width="200px" @confirm="deleteAttr(row.id)">
                            <template #reference>
                                <el-button type="primary" size="small" icon="Delete"
                                    v-has="`btn.Attr.remove`"></el-button>
                            </template>
                        </el-popconfirm>
                    </template>
                </el-table-column>
            </el-table>
        </div>
        <div v-show="scene == 1">
            <!-- 展示添加属性与修改属性的结构 -->
            <el-form :inline="true">
                <el-form-item label="属性名称">
                    <el-input placeholder="请输入属性的名称" v-model="attrParams.attrName"></el-input>
                </el-form-item>
            </el-form>
            <el-button type="primary" :disabled="attrParams.attrName ? false : true" size="default" icon="Plus"
                @click="addAttrValue">添加属性</el-button>
            <el-button type="primary" size="default" @click="cancel">取消</el-button>
            <el-table :data="attrParams.attrValueList">
                <el-table-column label="序号" width="80px" align="center" type="index"></el-table-column>
                <el-table-column label="属性值的名称">
                    <template #="{ row, $index }">
                        <el-input :ref="(vc: any) => inputArr[$index] = vc" @blur="toLook(row, $index)"
                            placeholder="请你输入属性名称" v-model="row.valueName" v-if="row.flag"></el-input>
                        <div v-else @click="toEdit(row, $index)">{{ row.valueName }}</div>
                    </template>
                </el-table-column>
                <el-table-column label="属性值操作">
                    <template #="{ row, index }">
                        <el-button type="primary" size="small" icon="Delete"
                            @click="attrParams.attrValueList.splice(index, 1)"></el-button>
                    </template>
                </el-table-column>
            </el-table>
            <el-button type="primary" size="default" @click="save"
                :disabled="attrParams.attrValueList.length > 0 ? false : true">保存</el-button>
            <el-button type="primary" size="default" @click="cancel">取消</el-button>
        </div>
    </el-card>
</template>
<script setup lang="ts">
import { watch, ref, reactive, nextTick, onBeforeUnmount } from 'vue';
import useCategoryStore from '@/stores/modules/category';
import { reqAttr, reqAddOrUpdateAttr, reqRemoveAttr } from '@/api/product/attr/index'
import type { AttrResponseData, Attr, AttrValue, AttrList } from '@/api/product/attr/type';
import { ElMessage } from 'element-plus';
//存储已有的属性与属性值
let attrArr = ref<AttrList>([]);
let categoryStore = useCategoryStore()
// 控制卡片内容切换
let scene = ref(0)
//收集新增的属性的数据
let attrParams = reactive<any>({
    attrName: "",//新增的属性的名字
    attrValueList: [//新增的属性值数组
    ],
    categoryId: '',//三级分类的ID
    categoryLevel: 3,//代表的是三级分类
})
//准备一个数组:将来存储对应的组件实例el-input
let inputArr = ref<any>([]);
// 监听仓库三级分类ID变化，获取信息展示
watch(() => categoryStore.c3Id, () => {
    //清空上一次查询的属性与属性值
    attrArr.value = [];
    //保证三级分类得有才能发请求
    if (!categoryStore.c3Id) return;
    getAttr()
})
//获取已有的属性与属性值方法
const getAttr = async () => {
    const { c1Id, c2Id, c3Id } = categoryStore;
    //获取分类下的已有的属性与属性值
    let result: AttrResponseData = await reqAttr(c1Id, c2Id, c3Id);

    if (result.code == 200) {
        attrArr.value = result.data;
    }
}
const addAttr = () => {
    // 每一次点击的时候先清空数据再收集数据
    Object.assign(attrParams, {
        attrName: "",//新增的属性的名字
        attrValueList: [//新增的属性值数组
        ],
        categoryId: categoryStore.c3Id,//三级分类的ID
        categoryLevel: 3,//代表的是三级分类       
    })
    // 展示编辑的表格
    scene.value = 1
}
const updateAttr = (row: Attr) => {
    // 展示编辑的表格
    scene.value = 1
    //将已有的属性对象赋值给attrParams对象即为
    //ES6->Object.assign进行对象的合并
    Object.assign(attrParams, JSON.parse(JSON.stringify(row)));
}
const cancel = () => {
    scene.value = 0
}
//添加属性值按钮的回调
const addAttrValue = () => {
    //点击添加属性值按钮的时候,向数组添加一个属性值对象
    attrParams.attrValueList.push({
        valueName: '',
        flag: true //控制每一个属性值编辑模式与切换模式的切换
    })
    //获取最后el-input组件聚焦
    nextTick(() => {
        inputArr.value[attrParams.attrValueList.length - 1].focus();
    })
}
// 保存按钮的回调
const save = async () => {
    // 收集参数，发起请求
    let result: any = await reqAddOrUpdateAttr(attrParams)

    if (result.code == 200) {
        // 切换场景
        scene.value = 0
        ElMessage({
            type: 'success',
            message: attrParams.id ? '修改成功' : '添加成功'
        })
        // 获取全部已有的属性
        getAttr()
    } else {
        ElMessage({
            type: 'error',
            message: attrParams.id ? '修改失败' : '添加失败'
        })
    }
}
//属性值表单元素失却焦点事件回调
const toLook = (row: AttrValue, $index: number) => {
    //非法情况判断1
    if (row.valueName.trim() == '') {
        //删除调用对应属性值为空的元素
        attrParams.attrValueList.splice($index, 1);
        //提示信息
        ElMessage({
            type: 'error',
            message: '属性值不能为空'
        })
        return;
    }
    //非法情况2
    let repeat = attrParams.attrValueList.find((item: any) => {
        //切记把当前失却焦点属性值对象从当前数组扣除判断
        if (item != row) {
            return item.valueName === row.valueName;
        }
    });

    if (repeat) {
        //将重复的属性值从数组当中干掉
        attrParams.attrValueList.splice($index, 1);
        //提示信息
        ElMessage({
            type: 'error',
            message: '属性值不能重复'
        })
        return;
    }
    //相应的属性值对象flag:变为false,展示div
    row.flag = false;
}
//属性值div点击事件
const toEdit = (row: AttrValue, $index: number) => {
    //相应的属性值对象flag:变为true,展示input
    row.flag = true;
    //nextTick:响应式数据发生变化,获取更新的DOM(组件实例)
    nextTick(() => {
        inputArr.value[$index].focus();
    })

}
//删除某一个已有的属性方法回调
const deleteAttr = async (attrId: number) => {

    //发相应的删除已有的属性的请求
    let result: any = await reqRemoveAttr(attrId);
    //删除成功
    if (result.code == 200) {
        ElMessage({
            type: 'success',
            message: '删除成功'
        })
        //获取一次已有的属性与属性值
        getAttr();
    } else {
        ElMessage({
            type: 'error',
            message: '删除失败'
        })
    }
}
//路由组件销毁的时候，把仓库分类相关的数据清空
onBeforeUnmount(() => {
    //清空仓库的数据
    categoryStore.$reset();
})
</script>
<style lang="scss" scoped></style>